Switch contact device and control switch

Abstract

The utility model provides a switch contact device and a control switch, and relates to the technical field of control switches, the switch contact device comprises a static contact assembly and a moving contact assembly, the static contact assembly comprises a static contact and a line bank, the moving contact assembly is driven to cooperate with the static contact for closing or opening, and the line bank is provided with a fixed part connected with the static contact. By arranging the line bank and reasonably arranging the position of the line bank, the current flowing through the moving contact and the line bank is ensured to be in the same direction, so that the magnetic field generated by the fixed part and the extension part generates an attractive force for abutting against the static contact on the moving contact assembly during closing. And safety accidents caused by continuous electric arc generated by separation of the moving contact and the static contact due to large repulsive force generated by large current of the moving contact and the static contact during short circuit are avoided. The utility model further provides a control switch which comprises an electromagnetic driving assembly and the switch contact device, and the electromagnetic driving assembly is in driving connection with the moving contact assembly and used for controlling the moving contact to be matched with the static contact for opening or closing.

Description

Technical Field

[0001] The utility model relates to the technical field of low-voltage electrical appliances, in particular to a switch contact device and a control switch. Background Art

[0002] Relays are common electronic devices. Existing high-voltage DC relays usually use moving and static contacts to connect the circuits respectively, and realize circuit connection by connecting and disconnecting the moving and static contacts. During use, since the moving and static contacts generate an electromagnetic field when they are connected, they will repel each other, especially when the application product fails and the short-circuit current becomes larger and larger. When the short-circuit current is applied, the moving and static contacts will generate a large electric repulsion force due to the magnetic field generated by the large current, which may easily cause the contacts to be repelled and cause continuous arcing, which may cause the product welding to fail and damage the equipment, or even cause the product to explode and cause safety accidents. Utility Model Content

[0003] The purpose of the utility model is to provide a switch contact device and a control switch to solve the above technical problems.

[0004] A switch contact device comprises: a stationary contact assembly and a moving contact assembly, the stationary contact assembly comprises a stationary contact and a terminal block, the moving contact assembly is driven to cooperate with the stationary contact to close or open the switch, the terminal block has a fixed portion connected to the stationary contact, when the moving contact assembly and the stationary contact are in a closed state, the direction of the current flowing through the fixed portion is the same as the direction of the current flowing through the moving contact assembly, so that the fixed portion generates an attractive force on the moving contact assembly for abutting against the stationary contact.

[0005] Furthermore, the switch contact device comprises at least two groups of stationary contact assemblies, the stationary contacts of the at least two groups of stationary contact assemblies are arranged at intervals, and the moving contact assembly is driven to cooperate with the stationary contacts of the at least two groups of stationary contact assemblies to synchronously close or open.

[0006] Furthermore, the wiring banks of the two groups of stationary contact assemblies are symmetrically arranged.

[0007] Furthermore, the terminal block further includes an extending portion and a terminal portion, the extending portion is connected between the fixing portion and the terminal portion, and the fixing portion, the extending portion and the terminal portion form a Z-shaped structure.

[0008] Further, one end of the extending portion away from the fixing portion extends toward a direction close to the moving contact assembly.

[0009] Furthermore, the moving contact assembly includes a mounting frame, a connecting spring and a moving contact, the moving contact is slidably arranged on the mounting frame, the connecting spring abuts between the mounting frame and the moving contact, and the mounting frame is driven to drive the moving contact to abut against the static contact.

[0010] Furthermore, the stationary contact assembly also includes a magnetic conductor, and the magnetic field generated by the magnetic conductor attracts the electromagnetic field generated when the terminal block is energized.

[0011] Furthermore, the wiring device of the DC contactor also includes a protective shell, the static contact and the moving contact assembly are both arranged inside the protective shell, the end of the static contact away from the moving contact extends to the outside of the protective shell, and the fixed part of the wiring bank is fixedly connected to the end of the static contact extending outside the shell.

[0012] Furthermore, the protective shell includes a sealing cover, the sealing cover is provided with a limiting groove, and the static contact is fixedly clamped in the limiting groove.

[0013] A control switch comprises an electromagnetic drive component and any of the above switch contact devices, wherein the electromagnetic drive component is drivingly connected to a moving contact component of the switch contact device and is used to control the moving contact to cooperate with a static contact to open or close the switch.

[0014] The utility model provides a switch contact device, which includes: a stationary contact assembly and a moving contact assembly, wherein the stationary contact assembly includes a stationary contact and a wiring row, wherein the moving contact assembly is driven to cooperate with the stationary contact to close or open the switch, and the wiring row has a fixed portion connected to the stationary contact. By setting the wiring row and arranging the position of the wiring row reasonably, it is ensured that the current flowing through the moving contact and the wiring row is in the same direction, so that when the switch is closed, the fixed portion generates an attractive force for the moving contact assembly to abut against the stationary contact. This avoids the moving contact and the stationary contact generating a large repulsive force due to the large current during a short circuit, which causes the moving contact and the stationary contact to separate and generate a continuous arc, thereby causing a safety accident, thereby improving safety.

[0015] The utility model also provides a control switch, which includes an electromagnetic drive assembly and the above-mentioned switch contact device, wherein the electromagnetic drive assembly is drivingly connected to the moving contact assembly and is used to control the moving contact to cooperate with the static contact to open or close the switch. It has high safety and is easy to operate. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the specific implementation methods of the utility model or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0017] Figure 1 A three-dimensional diagram of a moving contact assembly and a stationary contact in a wiring device of a DC contactor provided in an embodiment of the utility model;

[0018] Figure 2 An exploded view of a wiring device for a DC contactor provided in an embodiment of the utility model;

[0019] Figure 3 A cross-sectional view of a wiring device for a DC contactor provided in an embodiment of the utility model.

[0020] Icons: 100-static contact; 200-moving contact assembly; 300-terminal block; 201-mounting frame; 202-connecting spring; 203-moving contact; 401-fixed base; 402-limiting tube; 403-movable magnetic core; 404-reset spring; 405-control coil; 406-linkage rod; 500-magnetic conductor; 501-upper magnetic conductor; 502-lower magnetic conductor; 600-protective shell; 700-sealing cover; 701-limiting groove; 702-fixed slide groove; 703-mounting hole. DETAILED DESCRIPTION

[0021] In order to make the purpose, technical scheme and advantages of the embodiments of the utility model clearer, the technical scheme in the embodiments of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiments of the utility model. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Generally, the components of the embodiments of the utility model described and shown in the drawings here can be arranged and designed in various different configurations.

[0022] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the present invention to be protected, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0023] In the description of the present utility model, it should be noted that the terms "inside", "outside", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, or are the orientations or positional relationships in which the utility model product is usually placed when in use. They are only for the convenience of describing the present utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present utility model.

[0024] In addition, the terms "horizontal", "vertical" and the like do not mean that the components are required to be absolutely horizontal or suspended, but can be slightly tilted. For example, "horizontal" only means that its direction is more horizontal than "vertical", and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0025] In conjunction with the accompanying drawings, some embodiments of the present invention are described in detail below. In the absence of conflict, the following embodiments and features in the embodiments can be combined with each other.

[0026] Example 1

[0027] Please refer to Figure 1 As shown, this embodiment provides a switch contact device, which includes: a static contact assembly and a moving contact assembly 200, the static contact assembly includes a static contact 100 and a terminal block 300, the moving contact assembly 200 is driven to cooperate with the static contact 100 to close or open the switch, the terminal block 300 has a fixed portion connected to the static contact 100, when the moving contact assembly 200 and the static contact 100 are in a closed state, the direction of the current flowing through the fixed portion is the same as the direction of the current flowing through the moving contact assembly 200, so that the fixed portion generates an attractive force for the moving contact assembly 200 to abut against the static contact 100.

[0028] In this embodiment, the terminal block 300 is made of a strip of metal material, which is fixedly connected to the static contact 100 through a fixed portion and electrically connected to the static contact 100. The moving contact assembly 200 has a closing position abutting against the static contact 100 and an opening position away from the static contact 100, and the moving contact assembly 200 is driven to cooperate with the static contact 100 to close or open. The fixed portion of the terminal block 300 and the moving contact assembly 200 are arranged in a straight line to ensure that the direction of the current flowing through the fixed portion is the same as the direction of the current flowing through the moving contact assembly 200 when closing, so that the fixed portion generates an attractive force for the moving contact assembly 200 to abut against the static contact 100. When the moving contact assembly 200 is closed, the moving contact assembly 200 abuts against the static contact 100, and the current flows through the terminal block 300, the static contact 100 and the moving contact assembly 200 in sequence. Due to the electromagnetic effect, the terminal block 300 and the moving contact assembly 200 through which current passes will generate an electromagnetic field, and there will be a repulsive or attractive force between the generated electromagnetic fields, which will affect the use effect of the switch contact device. It can be understood that the traditional relay contact device usually adopts a parallel and spaced movable contact 203 and a stationary contact 100, and controls the movable contact 203 to move or deform through the electromagnetic drive assembly so that the movable contact 203 and the stationary contact 100 abut and separate from each other. When the movable contact 203 and the stationary contact 100 are connected, the current flowing through the movable contact 203 and the stationary contact 100 is in opposite directions, and the magnetic field generated will cause repulsion between the movable contact 203 and the stationary contact 100. When the circuit is normal, the repulsive force between the movable contact 203 and the stationary contact 100 is small, which will not affect the normal use of the contact device. However, when the external circuit is short-circuited, the current on the movable contact 203 and the stationary contact 100 is too large, and a strong magnetic field is generated at the same time. Affected by the magnetic field generated by the large current, a large repulsive force will be generated between the moving and static contacts 100, which may easily cause the moving contact 203 and the static contact to separate. At the moment of separation, the circuit is disconnected, and the moving contact 203 and the static contact 100 that have just been separated are reconnected and the separation and connection process is repeated. During the separation process of the moving contact 203, especially when used in high-voltage DC circuits, the continuous separation and connection of the moving contact 203 and the static contact 100 will cause continuous arcing, which may cause product welding failure and equipment damage at the least, or even cause product explosion and fire and other safety accidents. Please refer to Figure 1As shown, the switch contact device provided by the present invention is additionally provided with a terminal block 300, and the fixed portion of the terminal block 300 is connected to the static contact 100. The static contact 100 is arranged perpendicular to the moving contact assembly 200, and the fixed portion is arranged parallel or in a straight line with the moving contact assembly 200. The magnetic field generated by the current flowing through the terminal block 300 and the static contact 100 provides an attractive force to the moving contact plate, so that the moving contact 203 and the static contact 100 are tightly connected. During a short circuit, the greater the current flowing through, the greater the attraction of the terminal block 300 and the static contact 100 to the moving contact assembly 200, and the phenomenon of cyclic disconnection and connection of the moving contact 203 and the static contact 100 will not occur, thereby avoiding damage to the equipment or causing a safety accident, thereby improving the safety of the device.

[0029] Optionally, in some embodiments of the present embodiment, the switch contact device includes at least two groups of static contact assemblies, the static contacts 100 of the at least two groups of static contact assemblies are arranged at intervals, and the moving contact assembly 200 is driven to cooperate with the static contacts 100 of the at least two groups of static contact assemblies for synchronous closing or synchronous opening.

[0030] Please refer to Figure 1 As shown, the switch contact device is provided with two groups of stationary contact assemblies, the stationary contacts 100 of the two groups of stationary contact assemblies are arranged at intervals, and the two stationary contacts 100 are connected to the external circuit through the wiring row 300 respectively, while the moving contact assembly 200 does not need to be connected to the external circuit. The wiring rows 300 of the two groups of stationary contact assemblies are arranged symmetrically to ensure that the current flowing through the two wiring rows 300 is in the same direction as the current flowing through the moving contact assembly 200. When the switch is closed, the current flows from the wiring row 300 and the stationary contact 100 on one side through the moving contact assembly 200 to the moving contact 203 and the wiring row 300 on the other side. The electromagnetic field generated by the fixed part and the extension part of the two wiring rows 300 generates an attraction force on the moving contact assembly 200, so that the moving contact 203 and the stationary contact 100 are stably connected. The two groups of stationary contact assemblies arranged symmetrically on the left and right jointly generate a strong electromagnetic field to attract the moving contact assembly 200, thereby increasing the attraction force on the moving contact assembly 200. Since the external circuit is connected only through two stationary contacts 100, the moving contact 203 does not need to be connected to the external circuit and only serves as a wiring bridge for the two stationary contacts 100. Therefore, two contact points are formed between the moving contact 203 and the two stationary contacts 100. When opening the switch, the moving contact assembly 200 and the stationary contacts 100 on both sides are disconnected at the same time, and the circuit is quickly disconnected, which can greatly reduce the generation of arcs and improve safety. At the same time, the moving contact 203 can be opened or closed by moving in parallel, and no deformation will occur during the opening or closing process, thereby improving the service life of the moving contact 203.

[0031] Optionally, in some implementations of the present embodiment, the terminal block 300 further includes an extending portion and a terminal portion, the extending portion is connected between the fixing portion and the terminal portion, and the fixing portion, the extending portion and the terminal portion form a Z-shaped structure.

[0032] Please refer to Figure 1 and Figure 2 As shown, in this embodiment, the fixed portion is set as a straight line structure parallel to the moving contact 203, and the extension portion is connected between the fixed portion and the terminal portion. The terminal portion is used to connect the external wire and realize electrical connection with the fixed portion through the extension portion. In order to facilitate the connection of the external wire with the terminal portion, the terminal portion can be set parallel to the fixed portion, so that the terminal portion protrudes to facilitate welding or clamping operations. It should be noted that the terminal block 300 shown can be formed by bending a metal sheet to form the fixed portion, the extension portion and the terminal portion, which is easy to process and low in cost.

[0033] Optionally, in some implementations of this embodiment, one end of the extending portion away from the fixing portion extends toward a direction close to the moving contact assembly 200 .

[0034] Please refer to Figure 2 and Figure 3 As shown, the extension portion extends toward the moving contact assembly 200 , so that the terminal block 300 is bent toward the moving contact 203 , thereby reducing the longitudinal height of the switch contact device, rationalizing the spatial layout, and reducing the volume of the switch contact device.

[0035] Optionally, in other embodiments, the extension portion may extend in a direction away from the moving contact assembly 200 , so that the terminal block 300 is bent upward, and the protruding terminal portion is more convenient for connection with external wires.

[0036] In this embodiment, the moving contact assembly 200 includes a mounting frame 201, a connecting spring 202 and a moving contact 203. The moving contact 203 is slidably arranged on the mounting frame 201. The connecting spring 202 abuts between the mounting frame 201 and the moving contact 203. The mounting frame 201 is driven to drive the moving contact 203 to abut against the two static contacts 100.

[0037] Please refer to Figure 3As shown, the moving contact 203 is a strip structure, and the moving contact 203 is slidably arranged on the mounting frame 201, and the mounting frame 201 can move up and down, thereby driving the moving contact 203 to abut or separate from the static contact 100 to open or close the switch. Since the moving contact 203 does not need to be connected to the wire, the size of the moving contact 203 is not limited, and can be selected and set as needed, so as to change the size of the moving contact 203 to adapt to the use requirements of different volumes. The moving contact 203 and the mounting frame 201 are connected by a connecting spring 202 to provide elastic force for the moving contact 203. When closing the switch, the moving contact 203 abuts against the static contact 100, and at this time, the static contact 100 squeezes the moving contact 203 so that the connecting spring 202 is compressed and deformed. During the closing process, under the elastic force of the connecting spring 202, the moving contact 203 always abuts against the static contact 100, thereby improving the stability of the circuit connection and avoiding poor contact. In addition, the connecting spring 202 has a certain buffering effect, which can prevent the moving contact 203 from quickly hitting the static contact 100 when closing the switch, causing damage to the equipment.

[0038] Optionally, in some implementations of this embodiment, the moving contact assembly 200 further includes a magnetic conductor 500 , and the magnetic field generated by the magnetic conductor 500 and the electromagnetic field generated when the terminal block 300 is energized attract each other.

[0039] Please refer to Figure 1 As shown, the magnetic conductor 500 is arranged on the side of the stationary contact 100 close to the terminal block 300. The magnetic field generated by the terminal block 300 after being energized attracts the magnetic field generated by the magnetic conductor 500, thereby increasing the attraction between the moving contact assembly 200 and the fixed part. In addition to preventing the moving contact 203 from vibrating and causing damage to the circuit or electrical appliances during a short circuit, the magnetic conductor 500 can also attract the terminal block 300 during normal use, thereby improving the stability of the connection between the moving contact 203 and the stationary contact 100 during closing.

[0040] Optionally, in this embodiment, the magnetizer may include an upper magnetizer 501 and a lower magnetizer 502 arranged on both sides of the moving contact 203. The upper magnetizer 501 and the lower magnetizer 502 attract each other with the magnetic field generated when the terminal block is energized, and work together to generate magnetic force, so that the moving contact and the static contact are brought closer to each other. The stronger the magnetic field around the magnetizer, the more magnetic field the magnetizer gathers, and the greater the suction force between the upper and lower magnetizers.

[0041] Optionally, in some implementations of the present embodiment, the wiring device of the DC contactor also includes a protective shell 600, the static contact 100 and the moving contact assembly 200 are both arranged inside the protective shell 600, the end of the static contact 100 away from the moving contact 203 extends to the outside of the protective shell 600, and the fixed part of the terminal block 300 is fixedly connected to the end of the static contact 100 extending outside the shell.

[0042] Please refer to Figure 3As shown, the protective shell 600 moving contact assembly 200 and the static contact 100 are both arranged inside the protective shell 600. The protective shell 600 plays a packaging role for the moving contact assembly 200, which can protect the relatively fragile moving contact assembly 200 inside, avoid affecting the opening and closing movement effect of the moving contact assembly 200, or external liquid entering to cause corrosion and damage to electronic components, etc., and also prevent other personnel from contacting the internal moving contact 203 or static contact 100 to cause safety accidents. One end of the static contact 100 extends to the outside of the protective shell 600 for connecting the wire row 300. The fixed part of the terminal row 300 is fixedly connected to the end of the static contact 100 extending outside the shell, and the terminal part of the terminal row 300 extends to the outside of the protective shell 600, which is convenient for connecting external wires.

[0043] Optionally, in some implementations of the present embodiment, a sealing cover 700 is provided on the protective shell 600 , a limiting groove 701 is provided on the sealing cover 700 , and the static contact 100 is fixedly clamped in the limiting groove 701 .

[0044] Please refer to Figure 2 and Figure 3 As shown, a placement opening is provided at the upper end of the protective shell 600, which is convenient for installing the moving contact assembly 200 inside the protective shell 600. A sealing cover 700 is provided at the placement opening to achieve a packaging effect. At the same time, the protective shell 600 is provided with limiting grooves 701 corresponding to the number of static contacts 100, and the static contacts 100 are clamped in the limiting operation one by one. During the opening and closing process, the moving contact 203 will collide and squeeze with the static contact 100 many times, which may cause the static contact 100 to be displaced, affecting the use effect. By setting a limiting groove 701 on the sealing cover 700 that matches the shape of the static contact 100, the stability of the static contact 100 after installation is ensured, and the displacement of the static contact 100 that affects the normal use of the contact device is avoided.

[0045] Optionally, in some other embodiments, the terminal block 300 is detachably connected to the static contact 100. Since the terminal portion of the terminal block 300 extends to the outside of the protective housing 600, it may be broken and damaged by external impact. In this case, it is only necessary to disassemble the terminal block 300 for replacement without opening the entire protective housing 600, which is more convenient and quicker to operate.

[0046] Optionally, in some implementations of the present embodiment, a fixed slide groove 702 is provided on the sealing cover 700 , the fixed slide groove 702 is connected to the limiting groove 701 , one end of the terminal block 300 is passed through the fixed slide groove 702 and connected to the static contact 100 .

[0047] Please refer to Figure 2 and Figure 3As shown, the fixed slot 702 is used to limit the terminal block 300. It can be understood that the direction of the fixed portion of the terminal block 300 will affect the direction of the magnetic field it generates. In order to enable the magnetic field generated by the fixed portion to generate attraction to the moving contact assembly 200 when the terminal block 300 is energized, it is necessary to limit the position and angle of the terminal block 300 during installation and use. The fixed slot 702 is set, and the fixed portion is clamped in the fixed slot 702 to ensure that the installation position of the terminal block 300 meets the requirements and also ensure the stability of the terminal block 300 during use.

[0048] Optionally, in some implementations of the present embodiment, a mounting hole 703 is provided on the protective shell 600 , and the protective shell 600 can be installed and fixed through the mounting hole 703 in conjunction with bolts or studs.

[0049] Example 2

[0050] A control switch comprises an electromagnetic drive assembly and any of the above switch contact devices, wherein the electromagnetic drive assembly is drivingly connected to a moving contact assembly 200 and is used to control the moving contact 203 to cooperate with the static contact 100 to open or close the switch.

[0051] In this embodiment, the electromagnetic drive device is controlled by an external control device to drive the moving contact assembly 200 to move so as to abut or separate from the static contact 100. The electromagnetic drive assembly cooperates with the switch contact device to form a control switch in the form of a relay, and the moving contact 203 and the static contact 100 can be used to open or close the external high-voltage circuit.

[0052] Optionally, in some implementations of the present embodiment, the electromagnetic drive device includes a fixed base 401, a limiting tube 402, a movable magnetic core 403, a reset spring 404 and a control coil 405, the limiting tube 402 is arranged on the fixed base 401, the movable magnetic core 403 is slidably arranged inside the limiting tube 402, the moving contact 203 is fixedly connected to the movable magnetic core 403 through a linkage rod 406, the reset spring 404 is passed through the linkage rod 406, and one end of the reset spring 404 abuts against the movable magnetic core 403, and the other end abuts against the fixed base 401, and the control coil 405 is wound around the outside of the limiting tube 402 to form an electromagnet structure.

[0053] Please refer to Figure 3As shown, in this embodiment, the moving contact assembly 200 is connected to the movable magnetic core 403 through the linkage rod 406, and the moving magnetic core 403 can drive the moving contact assembly 200 to move up and down by moving up and down. An electromagnet structure formed by a control coil 405 is arranged outside the movable magnetic core 403. The control coil 405 is connected to the external control circuit. When powered on, the control coil 405 generates a magnetic field to push the movable magnetic core 403 to move. Under the action of the linkage rod 406, the moving contact assembly 200 abuts against the static contact 100 to complete the closing. On the contrary, when the control coil 405 is powered off, the movable magnetic core 403 is reset under the action of the reset spring 404, and the moving contact assembly 200 is separated from the static contact 100 to complete the opening. The control switch provided in this embodiment has high safety.

[0054] In summary, the utility model provides a switch contact device, which includes: a stationary contact assembly and a moving contact assembly 200, the stationary contact assembly includes a stationary contact 100 and a terminal block 300, the moving contact assembly 200 is driven to cooperate with the stationary contact 100 to close or open the switch, the terminal block 300 has a fixed portion connected to the stationary contact 100, and when the moving contact assembly 200 and the stationary contact 100 are in a closed state, the direction of the current flowing through the fixed portion is the same as the direction of the current flowing through the moving contact assembly 200, so that the fixed portion generates an attractive force for the moving contact assembly 200 to abut against the stationary contact 100. By setting the terminal block 300 and reasonably arranging the position of the terminal block 300, it is ensured that the current flowing through the moving contact 203 and the terminal block 300 is in the same direction, so that when the switch is closed, the fixed portion generates an attractive force for the moving contact assembly 200 to abut against the stationary contact 100. Safety is improved by avoiding the large repulsive force generated by the moving contact 203 and the stationary contact 100 due to the large current during a short circuit, which may cause the moving contact 203 and the stationary contact 100 to separate and generate a continuous arc, thereby causing a safety accident.

[0055] The utility model also provides a control switch, which includes an electromagnetic drive assembly and the above switch contact device, wherein the electromagnetic drive assembly is drivingly connected to the moving contact assembly 200, and is used to control the moving contact 203 to cooperate with the static contact 100 to open or close the switch. It has high safety and is easy to operate.

[0056] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the utility model, rather than to limit it. Although the utility model has been described in detail with reference to the aforementioned embodiments, ordinary technicians in this field should understand that they can still modify the technical solutions recorded in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not make the essence of the corresponding technical solution deviate from the scope of the technical solution of the embodiments of the utility model.

Claims

1. A switch contact device, characterized in that: include: A stationary contact assembly and a moving contact assembly (200), wherein the stationary contact assembly comprises a stationary contact (100) and a terminal block (300), wherein the moving contact assembly (200) is driven to cooperate with the stationary contact (100) to close or open the switch, wherein the terminal block (300) comprises a fixed portion, an extension portion and a terminal portion, wherein the fixed portion is connected to the stationary contact (100), and the extension portion is connected between the fixed portion and the terminal portion, and wherein the fixed portion, the extension portion and the terminal portion form a Z-shaped structure, wherein when the moving contact assembly (200) and the stationary contact (100) are in a closed state, the direction of the current flowing through the fixed portion is the same as the direction of the current flowing through the moving contact assembly (200), so that the fixed portion and the extension portion generate an attractive force for the moving contact assembly (200) to abut against the stationary contact (100).

2. The switch contact device according to claim 1, characterized in that: The switch contact device comprises at least two groups of the static contact assemblies, the static contacts (100) of the at least two groups of the static contact assemblies are arranged at intervals, and the moving contact assembly (200) is driven to cooperate with the static contacts (100) of the at least two groups of the static contact assemblies to synchronously close or open.

3. The switch contact device according to claim 2, characterized in that: The two groups of terminal blocks (300) of the stationary contact assemblies are symmetrically arranged.

4. The switch contact device according to claim 1, characterized in that: One end of the extension portion away from the fixing portion extends in a direction close to the moving contact assembly (200).

5. The switch contact device according to any one of claims 1 to 3, characterized in that: The moving contact assembly (200) comprises a mounting frame (201), a connecting spring (202) and a moving contact (203); the moving contact (203) is slidably arranged on the mounting frame (201); the connecting spring (202) abuts between the mounting frame (201) and the moving contact (203); and the mounting frame (201) is driven to drive the moving contact (203) to abut against the stationary contact (100).

6. The switch contact device according to claim 5, characterized in that: The moving contact assembly (200) further comprises an upper magnetic conductor (501) and a lower magnetic conductor (502), and the moving contact (203) is arranged between the upper magnetic conductor (501) and the lower magnetic conductor (502).

7. The switch contact device according to claim 1, characterized in that: The switch contact device also includes a protective shell (600), the static contact (100) and the moving contact assembly (200) are both arranged inside the protective shell (600), one end of the static contact (100) away from the moving contact (203) extends to the outside of the protective shell (600), and the fixed part of the terminal block (300) is fixedly connected to the end of the static contact (100) extending outside the shell.

8. The switch contact device according to claim 7, characterized in that: The protective housing (600) is provided with a sealing cover (700), the sealing cover (700) is provided with a limiting groove (701), and the static contact (100) is fixedly clamped in the limiting groove (701).

9. A control switch, characterized in that: It comprises an electromagnetic drive component and a switch contact device as claimed in any one of claims 1 to 8, wherein the electromagnetic drive component is drivingly connected to a moving contact component (200) of the switch contact device and is used to control the moving contact (203) to cooperate with the static contact (100) to open or close the switch.

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